[Chameleon] Image format of map

[Dirk Jesko]

Hi,

Simple question: How do I choose the format for the map image generated 
by a MapDHTML widget? Even though, my mapfile only specifies jpeg, I 
always get a 256 color PNG. Somehow, I can not find a way to change 
this. Since I have layers with true color imagery, 256 colors are 
insufficient.

Thanks,
Dirk Jesko